Drying apparatus



(No Model.)

' A. EDWARDS.

DRYING APPARATUS. H N0. 288,782. Patented Nov. 20, 1883.

WITNESSES UNITED STATES PATENT -OFFICE.

ALFRED EDWARDS, OF NEW HAVEN, CONNECTICUT.

DRYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 288,782, dated November 20, 1883,

Application filed February 8, 1883.

To aZZ whom it may concern.-

Be it known that I, ALFRED EDWARDS, of New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Drying Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and nsethe same, reference being had to the accompanying drawings, which form a part of this specification.

My invention has relation to that class of drying apparatus in which the beating medium is introduced into a revolving drum having spiral flanges for stirring and working the material to be dried through the drier; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

WVhen the wet material to be dried enters the cylinder, the moisture will first seek the bottom, and for the purpose of furnishing an additional amount of heat for that part of the cylinder I provide a semi-cylindrical outer steam-jacket for the lower half of the dryingcylinder, which will supply the additional heat for that portion.

In Figure l I have shown a vertical trans verse section of this apparatus, and in Fig, 2 a side elevation, partly broken away, to show the construction of the interior rotary stirrer and drying-cylinder.

Corresponding parts in both the figures are denoted by like letters of reference.

A is a cylindrical casing of any desired size, made of boiler-iron or other suitable material, in the top of which are arranged one or more outlets, a,'for the escape of the moisture and gases generated during the process of drying. The lower half of this casing is incased in a steam-jacket, B, mounted upon a suitably'constructed bed or support, which may be of masonry, wood, or metal, (not shown,) and provided with suitably-arranged inlets and outlets, by means of which it may be kept continually filled with hot steam, hot air, or hot water, if desired.

C isthe rotary drying-cylinder, made of suitable sheet metal, with tubular journals 6 (No model.)

and c at opposite ends, which work in boxes or bearings in the heads or ends of the cylindrical chamber or outer casing, A. On the outside of this cylinder C, and extending from end to end, is a series of spirally-arranged ribs or flanges, D, made of angle-iron, the outer edges of which have T-heads d, which impinge upon the cylinder A on the inside, and as cylinder C revolves will carry the brewers grains or other material to be dried around with it. The rotary cylinder C may be heated by steam or hot air entering it at one end through one of its tubular journals, and escaping at the other end, in which case said journals 1) and 0 should be provided with suitable valves, stuffing-boxes, and stop-cocks, for controlling the flow of steam or hot air. By this construction and arrangement of the rotary flanged inside cylinder, 0, and the stationary outside cylinder, A, the material to be dried is fed evenly and gradually through the drier from the feed-opening atone end to a discharge opening or outlet-,E, at the other end, and no part of it can adhere to the walls of the outer cylinder.

I am aware that it is not broadly new to construct drying apparatus with a stationary cylindrical casing surrounded by a steamjacket, and a rotary drum having spiral flanges, and I do not wish to claim such construction, broadly; but

What I claim, and desire to secure by Letters Patent of the United States, is v In a drying apparatus of the described class, the cylinder A, having its lower half incased in the semi-cylindrical steam jacket B, and provided with the outlets a on the top, in combination with the rotary heating-drum C, provided with spirally-arranged ribs or flanges I), having cross-heads conforming to the curvature of the cylinder A, and impinging upon the inside walls of the same, substantially as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto afiixed'my signature in presence of two witnesses.

ALFRED EDWARDS.

WVitnesses:

J no. C. Nonrn, CLIFFORD O. CHALKER. 

